Semi-automated testing devices for a plumbing stack are disclosed. A semi-automated testing device in accordance with the present disclosure may comprise a transfer pump configured to automatically fill the plumbing stack; at least one automated gripping element configured to grip a supplemental pipe coupled to a pipe of the plumbing stack via a connection; at least one automated sealing element configured to seal the connection; and at least one sensor configured to measure a water level of the supplemental piping. A method of testing the plumbing stack with the semi-automated testing device is also disclosed.

Semi-automated testing devices for a plumbing stack are disclosed. A semi-automated testing device in accordance with the present disclosure may comprise a transfer pump configured to automatically fill the plumbing stack; at least one automated gripping element configured to grip a supplemental pipe coupled to a pipe of the plumbing stack via a connection; at least one automated sealing element configured to seal the connection; and at least one sensor configured to measure a water level of the supplemental piping. A method of testing the plumbing stack with the semi-automated testing device is also disclosed.

A flush toilet includes: a toilet main body; a rim which is provided on an upper portion of a toilet bowl of the toilet main body and which flows a flush water into the toilet bowl; and a water level detection sensor which is provided inside the rim.

A flush toilet includes: a toilet main body; a rim which is provided on an upper portion of a toilet bowl of the toilet main body and which flows a flush water into the toilet bowl; and a water level detection sensor which is provided inside the rim.

An apparatus for determining a vertical level or density profile of a multi-layered fluid column including at least two different liquids, the apparatus comprising: an elongate vertical support member; and a plurality of measurement modules spaced apart, and supported along, the elongate vertical support member to form a vertical array of measurement modules; wherein each measurement module comprises: a support arm mounted to the elongate vertical support member and extending outwardly from the elongate vertical support member; a displacer carried on the support arm; and a force measurement device configured to measure a force attributable to a mass of the displacer mediated by a buoyancy of the displacer in the fluid column, wherein the plurality of measurement modules have a data connection to a data processing unit for transmitting measurement data from the plurality of measurement modules to the data processing unit, and wherein the data processing unit is configured to process the measurement data from the plurality of measurement modules and generate a level or density profile of the fluid column.

A liquid level detecting apparatus of a tank for a vehicle is provided. The apparatus includes a main detecting part that detects the liquid level of the liquid in a tank to output a liquid level detection signal corresponding to the liquid level and an auxiliary floater assembly that has an auxiliary floater provided to float on the liquid surface of the liquid in the tank. A gyro sensor is mounted to the auxiliary floater, and an angle detection signal corresponding to an inclined angle of the tank is output by the gyro sensor. A controller determines a final liquid level value by correcting a liquid level value obtained from the liquid level detection signal based on the angle detection signal.

Method and apparatus for real-time detection of the level of the cryogenic liquid in a container. The cryogenic liquid level detection apparatus includes a liquid level indicator, a floating scale, and a buoy attached at a bottom end of the floating scale. A top end of the floating scale moves against calibrated markings of the liquid level indicator, thereby indicating the level of the cryogenic liquid in real-time.

Semi-automated testing devices for a plumbing stack are disclosed. A semi-automated testing device in accordance with the present disclosure may comprise a transfer pump configured to automatically fill the plumbing stack; at least one automated gripping element configured to grip a supplemental pipe coupled to a pipe of the plumbing stack via a connection; at least one automated sealing element configured to seal the connection; and at least one sensor configured to measure a water level of the supplemental piping. A method of testing the plumbing stack with the semi-automated testing device is also disclosed.

Semi-automated testing devices for a plumbing stack are disclosed. A semi-automated testing device in accordance with the present disclosure may comprise a transfer pump configured to automatically fill the plumbing stack; at least one automated gripping element configured to grip a supplemental pipe coupled to a pipe of the plumbing stack via a connection; at least one automated sealing element configured to seal the connection; and at least one sensor configured to measure a water level of the supplemental piping. A method of testing the plumbing stack with the semi-automated testing device is also disclosed.

A reservoir tank includes a reservoir body defining a storage chamber for an operating fluid; and a float guide in the storage chamber. The float guide forms a float chamber on the inner side. The reservoir tank further includes a fluid level detection device that has a float moving up and down in the float chamber in accordance with fluctuations of a fluid level, and has a detector detecting when the float is below predetermined position. The reservoir tank is provided with a slit in the float guide. The slit is in communication with the storage chamber and the float chamber. An operating fluid passage is provided on an inner face of the float guide which is continuous with the slit, which is in communication with the slit and the float chamber.